摘要
通过测定高温胁迫下四季杧与台农一号杧一年生嫁接苗叶片生理生化指标的变化,探讨其耐热的生理生化机制。结果表明:随着高温胁迫时间的延长,四季杧和台农一号杧的丙二醛(MDA)含量和相对电导率均明显上升,但四季杧的上升幅度和含量均明显高于台农一号杧。保护酶活性方面,高温胁迫处理后四季杧的SOD酶先下降后上升,而台农一号杧则是先上升后下降,且其含量明显高于四季杧;CAT酶的含量在高温胁迫后2个品种均减少,但四季杧CAT酶的含量明显高于台农一号杧。渗透调节物质游离脯氨酸在高温胁迫处理后含量明显高于处理前,但台农一号杧的上升程度明显高于四季杧。可溶性糖的含量在处理后12 h时,四季杧的含量明显高于台农一号杧,但在处理后72 h时,结果却相反。可溶性蛋白含量先下降后上升,并且四季杧的上升程度明显高于台农一号杧。胁迫处理后2个杧果品种的叶绿素含量和叶片相对含水量均下降,但四季杧的含量均明显低于台农一号杧。综合各项指标,初步推测台农一号杧比四季杧更耐热。
To investigate the physiological and biochemical mechanism for heat resistance of mango, two Mangifera indica L cv. ＇Siji＇ and ＇Tainong No.1＇ were analyzed under high temperature stress. The results showed that MDA content and relative electrical conductivity both increased heat after treatment, but MDA contents and relative electrical conductivity were higher in ＇Siji＇ than ＇Tainong No.1＂. SOD activities of ＇Siji＇ first declined and then increased, but the enzyme activities were contrary in ＇Tainong No.1＇ and higher than ＇Siji＇ cuhivar. CAT activities decreased in both eultivars, but the activities were higher than ＇Siji＇ cultivar. The free proline contents increased both in the two cuhivars, but the contents rising degree in ＇Tainong No.1＇ was higher than ＇Siji＇ cultivar. The soluble sugar contents were higher in ＇Siji＇ euhivar than ＇Tainong No.l＇ after treated 12 h, but the results were opposite after treated 72 h. The soluble protein contents of both cultivars first declined and then increased, but the rising degree in ＇Siji＇cultivar was higher than＇Tainong No.1＇. The chlorophyll and relative water contents decreased in the two cuhivars, but the contents were lower in ＇Siji＇cuhivar than ＇Tainong No.1＇ Comprehensive comparative analysis showed that ＇Tainong No.1＇ was much more heat resistant than ＇Siji＇ cuhivar.
出处
《热带作物学报》
CSCD
北大核心
2016年第1期53-58,共6页
Chinese Journal of Tropical Crops
基金
广西自然科学基金项目(No.2013GXNSFDA019011
2014GXNSFBA118102)
广西高校科研项目(No.YB2014009)
关键词
杧果
高温胁迫
生理生化分析
Mango
High temperature stress
Physiological index
